Metal-stamping mechanism



lung. 7, 1923. 11,463,906 E. NORDSTROM METAL STAMPING MECHANISM Filed Nov. 11 1919 2 Sheets-Sheet 1 IN ENTOR Aug. 7, i923. 1,463.9Ufi

E. NORDSTROM METAL STAMPING MECHANISM Filed Nov. 11, 1919 2 Sheets-Sheet 2 A TORNEY5 Aug. 7,

E1130]? NORIDBTROM, OF NEWARK, NEW JERSEY, ASSIGI TQB, BY MESNE ASSIGNMENTS, 'E'O AMERICAN I BOTTLE SEAL CORPORATION, A CORPORATION OF DELAWARE.

METAL-STPINQ MECHSM.

application filed November 11, 1919. terial No. 937,201.

T all whom it may concern:

Be it known that I, ELOF Nonns'rRoM, a citizen of the United States, residin at Newark, county of Essex and State of ew Jersey, have invented certain new "and useful Improvements in Metal-Stamping Mechanism, of which the following is a specification.

This invention relates to mechanism for stamping metals or performing like operations. The primary object of this invention is to provide improved means of simple and durable construction whereby power is more cfliciently applied to the work. Specific details of invention will appear in the specification and be pointed out in the appended claims, reference being had to the accompanying drawings, which exemplify my in vention and in which Figure 1 is a sectional side elevation of an embodiment of my invention, parts being broken away;

Figure 2 is a front elevation of the same,

arts being broken away and parts shown in section;

Figure 3 is a side elevation of the operating cam detached;

Figure 4 is a front elevation of the cam.

Figure 5 is a fragmentary front elevation of the under stamplng head, the cap holding die and a portion of the rotary table being shown in section.

Figure 6 is a perspective view of a bottle cap showing the appearance of the projecting lobes after they have been acted upon by the stamping mechanism.

Referring more particularly to the drawings, my invention is illustrated in an adaptation to that portion of a cap making mechanism in which a cap after it has been shaped by the drawing operation, is brought between suitably arranged stamps for imparting the roughened surfaces to the laterally projecting lobes or wings on the cap mounted on a portion 1 of the machine frame, is a support 2 which carries a post 3 to which is secured one end of a spring a, the other end of said spring being connected to a coupling link 5 which is connected to the arms 6 and 7 of bell crank levers which are fulcrumed at 8 and 9 respectively. The upper bell crank lever is provided with a relatively long cam arm 10 which is provided with a cam roller 11 which runs on a cam 12. An arm 13 of said upper bell crank lever carries a plate 14 provided with a rounded extremity 15 which articulates in a hole or opening 16 formed in a reciprocatory sl1de'17. The arms 6 and 7 of the bell crank levers are connected to operate in unison by means of gear teeth 18. An arm 19 of the lower'bell'crank lever, carries a plate 20 provided with a rounded extremity 21 which articulates in a hole or opening 22 formed 1n a reciprocatory slide 23. The slides 17 and 23 reciprocate towards and away from each other, and in the present embodiment of my invention, a rotary table 24 carries a cap-holding die'or socket 25 by means of which a cap 26 which has been previously shaped by a drawing operation and provlded with lobes or wings 27 may be conveyed into position between the stamps carried by slides 17 and 23. As shown in Figure 2 of the drawings, the clamping heads 28, 28 are moved into clamping engagement with the top wall of the cap, while the stamping elements 29, 29 are made to operate upon the lobes or wings 27, 27 to impart nurled surfaces thereto. For this purpose, the cam 12 (see Figures 3 and 4:), is preferably constructed asa crown cam and comprises an inner run 30 of comparatively short extent corresponding to a brief pause of the stamping elements 29 in their operating engagement with the cap, a gradual run 31 extending between the inner run 30 and an outer run 32 of comparatively great extent which corresponds to the maximum separation of the slides and stamps.

At the end of the run 32, the cam roller 11 is released entirely by cam 12 so that the stamps are free to be accelerated by the spring 4 as the roller 11 drops from the outer to the inner run. The resulting stamping action is imparted in the form of a blow by means of a spring, the Work of resetting the spring being accomplished by a gradual climb of the cam roller from the inner to the outer runs of the cam. From an inspection of Figures 1 and 2, it will be seen that the upper clamping element 28 and the upper stamping elements 29, are provided with shank portions which are adj ustably mounted in a transverse bar or lug 33 and depend therefrom thru holes or openings in a lower bar or lug 34. The under clampin element and stamping elements, are sim' arly ad justably mounted in a transverse bar or lug 35 and extend upwardly thrn holes or opentilt? ings in a higher bar or In 36, Referring now to Figure 5, in the em iment of my invention shown on the drawings, the lower damping elements 29 are disposed below the die and in the direction toward which the caps 26 are moved when displaced from the forming and holding dies. In conse-' bar or lug 36. At each stamping stro e of the lower stamping elements, springs 37 are compressed 1n such a way as to maintain a 'ressure on the lobes 26' of the cap until a er the stamping elements have been lowered out of engagement.

I claim 1. In a device of the character described, cap holding means movable into and out of position for a cap therein to be operated upon, slides reciprocable towards and away from said cap-holding means, means carried by said slides and adapted to operate on the top and bottom surfaces of said cap, yieldably driven means for moving said slides toward each other, and means for moving said slides apart in opposition to said yieldable means and for releasing said slides to the operation of said yieldable means.

2. In a device of the character described, slides reciprocable towards and away from each other, a cap holder movable between said slides, stamping dies adapted to come together on a ca in said cap-holder, yieldab e means for drawing said slides together, and a cam for separatinggsaid slides against the power of said yieldable means.

3. In a device of the character described, slides reciprocable towards and away from each other, a cap holder movable between said slides, stamping dies adapted to come together on a cap in said cap-holder, yieldable means for drawing said slides together, and a cam for se rating said slides againstthe wer of sai ieldable means, said cams having a gradua run for retracting said slides and a sudden drop for permitting an accelerated operating stroke due to said yieldable means.

4. In a device of the character described, cooperating bell cranks, one arm of each bell crank being geared to an arm of the .other, a slide articulately connected to the other arm of each bell crank, cooperating stamps or dies carried by said slides, yield able means exerting a tendency to drive said slides toward each other, a cam arm carried by one of said bell cranks, and a cam operarm of each bell crank, cooperating stam s or dies carried by said slides, yieldab e means exerting a tendency to drive said slides toward each other, a cam arm carried by one of said bell cranks, and a cam operating on said cam arm, said yieldable means comprising a support, a coupl'in link connected to both said bell cranks, an a spring having opposite ends connected to said support and coupling link respectively. 6. In a device of the c aracter described, cooperating bell cranks, one arm of each bell crank being geared to an arm of the other, a slide articulately connected to the other arm of'each bell crank, cooperating.

stamps or dies carried by said slides, yieldable means exerting a tendency to drive said slides toward each other, a cam arm carried by one of said bell cranks, and a cam operating on said cam arm, said yieldable means comprising a support, a coupling link connected to both said bell cranks, and a spring having opposite ends connected to said support and couplin link respectivel said cam having a drdp substantially egiial to the distance between the extreme positions of the outer end of said cam arm.

7. Mechanism of the character described comprising cooperating bell crank levers, one arm of each of said levers being geared to one arm of the other of said levers, cooperating stamps or dies connected to said bell crank levers, means for yieldably driving said bell crank levers to force said stamps or dies towards each; other on opposite sides of the metal to be stamped, and means for displacing said bell crank levers in reverse directions for separating said stamps or dies.

8. In a stamping mechanism, a cap holder, a stamping element movable into and out of stamping engagement with: a cap in said cap holder, a support extending around said stamping element and movable therewith towards and away from said cap, and

a spring surrounding said stamping element and arranged to come into engagement with said cap before said stamping element and to remain in engagement therewith after said stamping element has moved out of engagement with said ca ELOF NSRDSTROM. 

